A flavonoid; scavenges DPPH and ABTS radicals (EC50s = 0.52 and 0.48 mg/ml, respectively) in cell-free assays; prevents hydrogen peroxide-induced decreases in tyrosine hydroxylase activity in PC12 cells and cell death in isolated rat mesencephalic neurons at 1 µM; decreases infarct size by 24.5, 45.8, and 63.2% at 2.5, 5, and 10 mg/kg, respectively, in a rat model of cerebral ischemia-reperfusion injury induced by transient MCAO